package com.company;

public abstract  class L_AbstractShape {
    public int width;    //几何图形的长
    public int height;    //几何图形的宽
    public L_AbstractShape(int width,int height)
    {
        this.width=width;
        this.height=height;
    }
    public abstract double area();    //定义抽象方法，计算面积
}
